8 Operation
8.1.1 Trial Operation for Servomotor without Load
8-6
8.1.1 Trial Operation for Servomotor without Load
In this section, confirm the cable connections of the main circuit power supply, motor and encoder except the
connection to host controller. Incorrect wiring is generally the reason why servomotors fail to operate properly
during the trial operation.
Confirm the wiring, and then conduct the trial operation for servomotor without load.
The operation and the display are the same both for the panel operator and optional digital operator (JUSP-
OP02A-2).
• Release the coupling between the servomotor and the machine, and secure only the servomotor without a
load.
To prevent accidents, initially perform the trial operation for servomotor under no-load conditions (with all couplings
and belts disconnected).
CAUTION
Step
Description
Check Method and Remarks
1
Secure the servomotor.
Follow
3.3.1 Precautions on Servomotor Installation
and secure
the servomotor mounting plate to the machine in order to prevent
the servomotor from moving during operation.
Do not connect the servomotor shaft to the machine. The servomo-
tor may tip over during rotation.
2
Check the power supply circuit, servomotor, and encoder
wiring.
With the CN1 connector not connected, check the power supply
circuit and servomotor wiring.
Refer to
6.1 Wiring Main Circuit
for wiring example of main cir-
cuit. Refer
to 2.4 Selecting Cables
for motor and encoder cables.
3
Turn ON the control power supply and main circuit power
supply.
Normal Display
Example of Alarm Display
If the power is correctly supplied, the panel operator display on the
front panel of the SERVOPACK will appear as shown on the left.
The display on the left indicates that Forward Run Prohibited (P-
OT) and Reverse Run Prohibited (N-OT). For details, refer to
7.1.4 Status Display
.
If an alarm display appears, the power supply circuit, servomotor
wiring, or encoder wiring is incorrect. If an alarm is displayed, turn
OFF the power, find the problem, and correct it.
Refer to
10.1 Troubleshooting
.
4
Release the brake before driving the servomotor when a
servomotor with brake is used.
When using an absolute encoder, encoder setup is required
before running the servomotor.
Refer to
8.3.4 Setting for Holding Brakes
and
8.4.5 Absolute
Encoder Setup (Fn008)
.
Absolute Encoder Setup (Fn008) operation can be omitted when
setting the Pn002 to n.
1
(uses absolute encoder as an incre-
mental encoder) only during trial operation.
Secure the mounting plate
of the servomotor to the
equipment.
Do not connect anything
to the shaft
(no-load conditions).
Check the wiring
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